Improvement in devices for hoisting and setting stone



E. DUE.

DEVICE FOR noxswme AND SETTING swam.

N ,.184,75'6. Patented Nov. 28, 1876.

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NITED STATES PATENT OFFICE.

ELLIOT DUE, OF WALTHAM, MASSACHUSETTS.

IMPROVEMENT IN DEVICES FOR HOISTING AND SETTING STONE.

- Specification forming part of Letters Patent No. 184,766, datedNovember 28, 1876; application filed March 10, 1876.

To all whom it may concern Be it known that I, ELLIOT DUE, of Waltham,Middlesex county, in the State of Massachusetts, have invented anImproved Device for Hoisting and Setting Stone, of which the followingis a specification:

The object of my invention is to provide a long-needed device forlifting stone, setting ashler curbing, posts, and similar work, whichshall at once he inexpensive, portable, quickly and easily adjusted andreadjusted at pleasure and convenience.

The device may be used to great advantage for a multitude of purposes,which it is not necessary to mention here. Its most common use, however,will be in setting sto'ne curbing For this purpose derricks have beenused heretofore, but the frequent removals necessary to keep along withthe work render the derrick of very doubtful utility forlhis class ofwork, so much so that it is generally dispensed with altogether, and thework performed by men with crow-bars. This requires a gang of at leastfive men to each length of curbing while setting the same.

The invent-ion herein described is so light that it is easily handledand carried about by one man, and, when folded up, is very compact,requiring but little space for transportation.

The accompanying drawing gives a perspective view of my invention,showing the device as it is set ready for use.

In the manufacture of the same I prefer to use wood for the stand, legs,and lever, thus securing a stiff, light, and inexpensive machine.

The fulcrum-stand or frameA being made of wood, the legs or postsarespread at the base an appropriate distance apart, but brought nearlytogether at the top. They are appropriately braced, and secured at thetop and bottom, so that this part of the frame shall be stiff, firm, andreliable. Each post is made to project at the top suficiently above thefulcrum-bolt, O, to prevent undue lateral motion or sliding of the leverE. The feet B B B B are provided with spurs, to prevent slipping, as thewhole device must stand at an angle.

Care should be taken in building to see that all the parts of thefulcrum-stand A are firmly united, thus preventing any swaying orlateral motion under pressure and weight.

The fulcrum-bolt (1 serves the double purpose of firmly securing thelegs of the stand A and a fulcrum for the lever E, thus receiving theextra wear and strain, which are greater at this point than any other.When built for practical use, no space is left between the bolt on theunder sideand the wood, thus giving the fulcrum the full strength andsolidity the legs may be swung to such position as may I be desired togive a suitable footing to support the fulcrum-stand in the desiredposition.

The bar I is not necessarily a part of this machine, as, when inpractical use, any ordinary crow-bar will answer the purpose, andperform the function assigned to the bar I. It is attached to the modelsimply for convenience in illustrating the use of the hook P,hereinafter more fully explained. In the practical working machine thelever E is made of wood, the split or claw hook K being appropriatelyattached to the same. Beneath the lever E, where it comes in contactwith the fulcrum, a corrugated fulcrum frictioniron, L, is placed, andappropriately secured to the lever, which strengthens the lever at thepoint where strength is the most needed, prevents slipping on thefulcrum, and protects the lever from excessive Wear. The hoistingchain Mshould be such as is ordinarily used for stone-work. The stay-chain N isappropriately attached to the fulcrum-stand at 0.

To the opposite end of this chain is attached 7 the claw-hook P.

To illustrate the operation of the machine I will describe its use andoperation in setting stone curbing. One man easily carries the stand tothe point desired, and sets it up so asto span the ditch prepared forthe curbing, with the stone therein to be set. The legs D D are soplaced as to furnish the necessary brace and support to thefulcrum-stand A. The chain M being properly adjusted to the stone to beraised, the lever E is thrown over the fulcrumbolt G, and the split orclaw hook K is depressed, so as to catch the chain M at a low point.-The man at the lever, pressing down upon the, same, raises the stone.The

lever being usually some fifteen feet in length,

an immense power is obtained by one man. If the stone is not raised toasufiicieutheight by the first operation of the lever, the bar I (or anyordinary bar that may be at hand) is thrown across the legs D D, as nearto the chain M as may be desirable. The claw-hook P is thrown over thebar I, and hooked onto the chain M, and thus holds the load while a newbitch is obtained with the. lever. K. 1

Should the leverman be required at some other point, the hook P is againadjusted to sustain the stone at the point to: which it has been raised.t

It is obvious that by changing the position. of the bar I, the positionof the stone may be also changed to the point desired. The bar I, onceadjusted, is held securely in its position by friction without furtherattachment.

When not in use the chain N and hook P may be thrown back over thebrace-bar B, out of the way of the operators.

Having thus described my invention, its.

constructiomand practical use, what I claim as new, and desire to secureby Letters Patent,is-

1. The combination of the claw-hooked lever E with a fulcrum-stand,composed and l formed as follows, to: Wit: The triangular stand A andthe swinging or adjustable legs D D, formed, arranged, and secured asdescribed.

2. In a stone-hoisting machine, the combination of the stay-chain N andclaw-hook P,

I. with the stand A, and the ordinary hoistingchain M, substantially 'asshown, and for the purpose specified. i

3. In a fulcrum-stand for a hoisting-machine, the projections above andOn each side of the fulcrum-bolt 0, formed and used substantially asshown and described.

4. The combination of, the lever E, hook K, chain M, stand A, chain N,and claw-hook P, substantially'as shown and described.

' ELLIOT DUE.

Witnesses:

FRANCIS G. KING, .J. D. VAN .SLYGK.

